@if(count($errors) > 0)
  <div class="alert alert-danger">
    <h4>有错误发生：</h4>
    <ul>
      @foreach( $errors->all() as $error)
        <li><i class="glyphicon glyphicon-remove"></i>{{ $error }}</li>
      @endforeach
    </ul>
  </div>
@endif